dseg at 11h
	val1: ds 1; 0x0f
	val2: ds 1; 0x42
cseg at 0

	mov val1, #0x0f
	mov val2, #0x42
	mov r0, #0x02
	mov r1, #0x00
	ljmp start 

start:
	xch a, 0x12
	subb a, r0
	subb a, 0x11 
	xch a, @r1 
	rl a 
	nop
end